content: /**
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in
   * compliance with the License. You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software distributed under the License is
   * distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See
   * the License for the specific language governing permissions and limitations under the License.
   */
  
  package io.reactivex.flowable.internal.operators;
  
  import static org.mockito.ArgumentMatchers.any;
  import static org.mockito.Mockito.*;
  
  import java.util.List;
  import java.util.concurrent.TimeUnit;
  
  import org.junit.*;
  import org.mockito.InOrder;
  import org.reactivestreams.*;
  
  import io.reactivex.common.*;
  import io.reactivex.common.exceptions.*;
  import io.reactivex.flowable.*;
  import io.reactivex.flowable.internal.subscriptions.BooleanSubscription;
  import io.reactivex.flowable.processors.PublishProcessor;
  
  public class FlowableThrottleFirstTest {
  
      private TestScheduler scheduler;
      private Scheduler.Worker innerScheduler;
      private Subscriber<String> observer;
  
      @Before
      public void before() {
          scheduler = new TestScheduler();
          innerScheduler = scheduler.createWorker();
          observer = TestHelper.mockSubscriber();
      }
  
      @Test
      public void testThrottlingWithCompleted() {
          Flowable<String> source = Flowable.unsafeCreate(new Publisher<String>() {
              @Override
              public void subscribe(Subscriber<? super String> observer) {
                  observer.onSubscribe(new BooleanSubscription());
                  publishNext(observer, 100, "one");    // publish as it's first
                  publishNext(observer, 300, "two");    // skip as it's last within the first 400
                  publishNext(observer, 900, "three");   // publish
                  publishNext(observer, 905, "four");   // skip
                  publishCompleted(observer, 1000);     // Should be published as soon as the timeout expires.
              }
          });
  
          Flowable<String> sampled = source.throttleFirst(400, TimeUnit.MILLISECONDS, scheduler);
          sampled.subscribe(observer);
  
          InOrder inOrder = inOrder(observer);
  
          scheduler.advanceTimeTo(1000, TimeUnit.MILLISECONDS);
          inOrder.verify(observer, times(1)).onNext("one");
          inOrder.verify(observer, times(0)).onNext("two");
          inOrder.verify(observer, times(1)).onNext("three");
          inOrder.verify(observer, times(0)).onNext("four");
          inOrder.verify(observer, times(1)).onComplete();
          inOrder.verifyNoMoreInteractions();
      }
  
      @Test
      public void testThrottlingWithError() {
          Flowable<String> source = Flowable.unsafeCreate(new Publisher<String>() {
              @Override
              public void subscribe(Subscriber<? super String> observer) {
                  observer.onSubscribe(new BooleanSubscription());
                  Exception error = new TestException();
                  publishNext(observer, 100, "one");    // Should be published since it is first
                  publishNext(observer, 200, "two");    // Should be skipped since onError will arrive before the timeout expires
                  publishError(observer, 300, error);   // Should be published as soon as the timeout expires.
              }
          });
  
          Flowable<String> sampled = source.throttleFirst(400, TimeUnit.MILLISECONDS, scheduler);
          sampled.subscribe(observer);
  
          InOrder inOrder = inOrder(observer);
  
          scheduler.advanceTimeTo(400, TimeUnit.MILLISECONDS);
          inOrder.verify(observer).onNext("one");
          inOrder.verify(observer).onError(any(TestException.class));
          inOrder.verifyNoMoreInteractions();
      }
  
      private <T> void publishCompleted(final Subscriber<T> observer, long delay) {
          innerScheduler.schedule(new Runnable() {
              @Override
              public void run() {
                  observer.onComplete();
              }
          }, delay, TimeUnit.MILLISECONDS);
      }
  
      private <T> void publishError(final Subscriber<T> observer, long delay, final Exception error) {
          innerScheduler.schedule(new Runnable() {
              @Override
              public void run() {
                  observer.onError(error);
              }
          }, delay, TimeUnit.MILLISECONDS);
      }
  
      private <T> void publishNext(final Subscriber<T> observer, long delay, final T value) {
          innerScheduler.schedule(new Runnable() {
              @Override
              public void run() {
                  observer.onNext(value);
              }
          }, delay, TimeUnit.MILLISECONDS);
      }
  
      @Test
      public void testThrottle() {
          Subscriber<Integer> observer = TestHelper.mockSubscriber();
          TestScheduler s = new TestScheduler();
          PublishProcessor<Integer> o = PublishProcessor.create();
          o.throttleFirst(500, TimeUnit.MILLISECONDS, s).subscribe(observer);
  
          // send events with simulated time increments
          s.advanceTimeTo(0, TimeUnit.MILLISECONDS);
          o.onNext(1); // deliver
          o.onNext(2); // skip
          s.advanceTimeTo(501, TimeUnit.MILLISECONDS);
          o.onNext(3); // deliver
          s.advanceTimeTo(600, TimeUnit.MILLISECONDS);
          o.onNext(4); // skip
          s.advanceTimeTo(700, TimeUnit.MILLISECONDS);
          o.onNext(5); // skip
          o.onNext(6); // skip
          s.advanceTimeTo(1001, TimeUnit.MILLISECONDS);
          o.onNext(7); // deliver
          s.advanceTimeTo(1501, TimeUnit.MILLISECONDS);
          o.onComplete();
  
          InOrder inOrder = inOrder(observer);
          inOrder.verify(observer).onNext(1);
          inOrder.verify(observer).onNext(3);
          inOrder.verify(observer).onNext(7);
          inOrder.verify(observer).onComplete();
          inOrder.verifyNoMoreInteractions();
      }
  
  
      @Test
      public void throttleFirstDefaultScheduler() {
          Flowable.just(1).throttleFirst(100, TimeUnit.MILLISECONDS)
          .test()
          .awaitDone(5, TimeUnit.SECONDS)
          .assertResult(1);
      }
  
      @Test
      public void dispose() {
          TestHelper.checkDisposed(Flowable.just(1).throttleFirst(1, TimeUnit.DAYS));
      }
  
      @Test
      public void badSource() {
          List<Throwable> errors = TestCommonHelper.trackPluginErrors();
          try {
              new Flowable<Integer>() {
                  @Override
                  protected void subscribeActual(Subscriber<? super Integer> observer) {
                      observer.onSubscribe(new BooleanSubscription());
                      observer.onNext(1);
                      observer.onNext(2);
                      observer.onComplete();
                      observer.onNext(3);
                      observer.onError(new TestException());
                      observer.onComplete();
                  }
              }
              .throttleFirst(1, TimeUnit.DAYS)
              .test()
              .assertResult(1);
  
              TestCommonHelper.assertUndeliverable(errors, 0, TestException.class);
          } finally {
              RxJavaCommonPlugins.reset();
          }
      }
  
      @Test
      public void backpressureNoRequest() {
          Flowable.range(1, 3)
          .throttleFirst(1, TimeUnit.MINUTES)
          .test(0L)
          .assertFailure(MissingBackpressureException.class);
      }
  }
  